es6类的继承

1、es6类的继承：

class Father{
            constructor(){
                this.xx = "A";
                this.dna = "染色体";

            }
        }
    class Child extends Father{
        constructor (){
            super();
            this.name = "euanxiaohua"
            this.age = 18
        }

    }
    const child = new Child()
    console.log(child)